Performance of photon reconstruction and identification with the CMS detector in proton-proton collisions at s = 8 TeV
Name
_2015_J._Inst._10_P08010.pdf
Description
Published version
Size
1.57 MB
Format
Adobe PDF
Checksum (MD5)
632389ed0ad631b9a8c7cd5f24c22e0b
Author(s)
The CMS Collaboration
Date Issued
August 1, 2015
Journal
Journal of Instrumentation
Publisher
IOP Publishing
Citation
Khachatryan, V., et al. "Performance of Photon Reconstruction and Identification with the Cms Detector in Proton-Proton Collisions at S = 8 Tev." Journal of Instrumentation 10 8 (2015).
Version
Final published version
Abstract
© CERN 2015 for the benefit of the CMS collaboration. A description is provided of the performance of the CMS detector for photon reconstruction and identification in proton-proton collisions at a centre-of-mass energy of 8 TeV at the CERN LHC. Details are given on the reconstruction of photons from energy deposits in the electromagnetic calorimeter (ECAL) and the extraction of photon energy estimates. The reconstruction of electron tracks from photons that convert to electrons in the CMS tracker is also described, as is the optimization of the photon energy reconstruction and its accurate modelling in simulation, in the analysis of the Higgs boson decay into two photons. In the barrel section of the ECAL, an energy resolution of about 1% is achieved for unconverted or late-converting photons from Hγγ decays. Different photon identification methods are discussed and their corresponding selection efficiencies in data are compared with those found in simulated events.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Terms of Use
Creative Commons Attribution 3.0 unported license
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1088/1748-0221/10/08/P08010
